A study of year 2012 Baltimore City homicides shows that the presence of public police surveillance cameras do not lead to a significant increase in homicide closure rate.

In the year 2012 Baltimore City had 217 homicides. Of those homicides, as of May 12, 2013, 72 have been closed by the following events: Someone has been charged in the murder, the police know what happened but refuse to press charges, or the suspect has died. In 2012 Baltimore City utilized 587 public surveillance cameras that were monitored by the city police department. Cameras were installed at roadway intersections and recorded video imagery in all directions. 34 of the city homicides occurred within a one block distance from a police surveillance camera. One block is defined as within a 100 street address value of the intersection where a camera is installed. Here are the homicide case closure results:

Of the 217 city homicides in th year 2012, 72 of them have been closed yielding an overall closure rate of 33.2%.

34 homicides occurred within one city block of a police CCTV camera. Of those homicides, 12 have been closed yielding a closure rate of 35.3%

183 homicides did not occur near a police cameras. Of those homicides 60 have been closed yielding a no-camera closure rate of 32.8%.

The increase of homicide case closures near a police surveillance camera over those that did not occur near a camera was a paltry 2.5%.

The 2012 city homicides that occurred within one block of a surveillance camera, and information regarding their case closure is as follows: